AP source: Suspect is 24; younger brother held

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WASHINGTON - The suspect in the Connecticut school shootings is 24-year-old Ryan Lanza, and his younger brother is being held for questioning as a possible second shooter, a law enforcement official said Friday. The law enforcement official says the boys' mother, Nancy Lanza, worked at the school as a teacher and is presumed dead.

The official also said Ryan Lanza's girlfriend and another friend are missing in New Jersey.

Speaking on condition of anonymity, the official said the suspect is dead from a self-inflicted gunshot wound. The official spoke on the condition of anonymity because the source was not authorized to speak on the record about the developing criminal investigation.

According to the official, the suspect drove to the scene of the shootings in his mother's car. Three guns were found at the scene - a Glock and a Sig Sauer, both pistols - and a .223-caliber rifle. The rifle was recovered from the back of a car at the school. The two pistols were recovered from inside the school.